RAID 1 with existing data

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Joined
14 Dec 2008
Posts
628
Is there any way at all to implement RAID 1 on two drives, where one of the drives has existing data (that you want to keep) and one is blank?

I have a 6Tb in a NAS, and would love to add another at some point, but the idea of buying a third, just to hold a copy of the data temporarily, just seems wrong to me. And expensive!
 
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